Apparatus for color electrophotography

Abstract

An apparatus for color electrophotography including optical scanning means which moves intermediate a stationary original document and a copy sheet for scanning the colored image on the document onto, and a drum-shaped photoreceptor which is rotated in synchronism with the scanning movement of said scanning means. Successive images are scanned through different color filters to form successive electrostatic latent images thereon which are successively transferred from the rotating photoreceptor onto a stationary copy sheet. Each electrostatic image is successively developed using developer of a color corresponding to that of the filter used during the preceding scan before the following scan.

What is claimed is: 
     
       1. An apparatus for colour electrophotography comprising: movable optical scanning means for successively scanning a stationary original document by moving thereacross from one end to the other;   at least one drum-shaped photoreceptor means movable together with the scanning means and rotated in synchronism with its movement such that its peripheral surface is exposed to an optical image from the scanning means for forming an electrostatic image of said original document thereon;   a plurality of different colour filter means for successively filtering the optical image to said photoreceptor during successive scans;   means for holding a copy sheet stationary in the path of said rotating photoreceptor during each scan of the scanning means to permit each electrostatic latent image from the photoreceptor to be successively transferred thereto; and   means for successively developing each latent image on the copy sheet with a developer of a colour corresponding to that of the filter used during the preceding scan.   
     
     
       2. An apparatus according to claim 1 in which the developing means is adapted to move together with the scanning means. 
     
     
       3. An apparatus according to claim 1 in which the number of photoreceptors is equal to the number of the filters used. 
     
     
       4. An apparatus according to claim 1 in which the number of scanning means is equal to the number of the filters used.